From: Keith Busch <keith.busch@intel.com>
To: Parav Pandit <parav.pandit@avagotech.com>
Cc: linux-nvme@lists.infradead.org, willy@linux.intel.com,
axboe@kernel.dk, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] NVMe: Avoid interrupt disable during queue init.
Date: Thu, 21 May 2015 19:34:20 +0000 (UTC) [thread overview]
Message-ID: <alpine.LNX.2.00.1505211931470.15930@localhost.lm.intel.com> (raw)
In-Reply-To: <1432253553-17045-1-git-send-email-parav.pandit@avagotech.com>
On Thu, 21 May 2015, Parav Pandit wrote:
> Avoid diabling interrupt and holding q_lock for the queue
> which is just getting initialized.
>
> With this change, online_queues is also incremented without
> lock during queue setup stage.
> if Power management nvme_suspend() kicks in during queue setup time,
> per nvmeq based q_lock spinlock cannot protect device wide
> online_queues variable anyway.
The q_lock is held to protect polling from reading inconsistent data.
next prev parent reply other threads:[~2015-05-21 19:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-22 0:12 [PATCH] NVMe: Avoid interrupt disable during queue init Parav Pandit
2015-05-21 18:39 ` Jens Axboe
2015-05-21 19:14 ` Parav Pandit
2015-05-21 19:34 ` Keith Busch [this message]
2015-05-22 4:15 ` Parav Pandit
2015-05-22 14:48 ` Keith Busch
2015-05-22 14:51 ` Parav Pandit
2015-05-22 15:11 ` Keith Busch
2015-05-22 16:03 ` Parav Pandit
2015-05-22 16:23 ` Keith Busch
2015-05-22 16:48 ` Parav Pandit
2015-05-22 17:07 ` Keith Busch
2015-05-22 17:33 ` Parav Pandit
2015-05-22 17:47 ` Keith Busch
2015-05-22 18:18 ` Parav Pandit
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